Note about Sondes and their use: If you're planning to use the XTpc with a Sonde, you'll need to purchase a Sonde separately. You will also need to let us know prior to ordering the XTpc locator that you plan to use it with a Sonde, so the factory can install the correct software on the locator before it is shipped. Please note that the Schonstedt XTpc can only do one Sonde at a time. If you have the factory configure your XTpc for 512kHz, you lose the 33kHz, or 82kHz whichever you had configured or had purchased. Further, you can consider using an inductive antenna which induces a signal through the ground onto a line when you cannot do a direct connect with conductive clips, nor an induction clamp.